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A record-breaking 'concreteberg' as heavy as a blue whale has been discovered in a north London sewer.
The blockage, caused by people pouring concrete into drains, is the largest that water company Thames Water has ever seen.
Time - Metres - Tonnes
Over time it has built up to become at least 100 metres long and weighing 105 tonnes.
Residents have been told the 'concreteberg' will take at least two months to remove with pneumatic drills and high pressure jets, with work beginning next week.
Tankers - Standby - Sewage - Concrete - Thames
Tankers will be kept on standby to pump out any backed-up sewage blocked by the concrete, Thames Water said.
The solidified concrete is more dense than a so-called 'fatberg', made up of fat, oil and wet wipes, and has set to the walls of the Victorian-era sewer.
Blockages - Thames - Water - Company - Water
Blockages cost Thames Water, the company that supplies water to London and the Thames Valley,...
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